Refrigerating plant



Feb. 23, 1932.

L.. L. TORREY REFR I GERATI NG PLANT Filed Feb. 18 1926 Strom/e144 lFeb. 23, 1932. 1 L. ToRRr-:Y

REFRIGERATING PLANT F'led Feb 18. 1926 5 Sheets-Sheet 2 Feb. 23, 1932.

l A TORREY REFRIGERATING PLANT Filed Feb. 18, 1926 :5 SheetS--SheeA 5Feb. 23, 1932. L. l.v TORREY REFRIGERATING PLANT Filed Feb. 18. 1926 5Sheets-Sheet 4 Feb. 23, 1932. L.. 1 TORREY REFRGERATING PLANT 5Sheets-.Sheet 5 Filed Feb. 18, 1926 Patented Feb. 23, 1932 LUCIE L.TORREY, OF LOS ANGELES, CALIFORNIA BEFRIGEBATING PLANT Application led'February 18, 1928. Serial No. 89,119.

with refrigerating requirements. or manually at the desire of theattendant where an apartment is to be ventilated when the refrigeratingthermostat control has stopped the power plant.

A further object is to provide Ventilating ducts for such air-cooledapparatus whereby4 the air may he drawn from or delivered to theexterior of the apartment as desired.

Another feature is to provide Ventilating means whereby the obnoxiousgases escaping in event of leakage may be discharged outside theapartment.

Another feature is the construction of a rigidly and compact-lyassembled unit having the driving mechanism, air Ventilating fan, andgas compressor mounted with the appropriate reducing gearing upon a basewhich contains the cooling pipes and the storage reservoir for theliquid refrigerant.

Another feature is the arrangement of the air Ventilating fan, thecooling pipes, and the base in such manner that fresh and cool air isbeing drawn in at a point distant from the exit of the heated air.

Further fea-tures are the simple and rigid assembly of the several partsof the unit with regard to each other, whereby space and weight areconserved; the employment of paclrings about the drivingl shaft so as toprevent escape of obnoxious gas. and the presence of an oiling systemfor this shaft which 45 prevents the escape of such gases duringreplenishment of oil.

TWith these and other objects in View, as will appear in the course ofthe following specification and claims. the drawings illustrate one formof execution of this invention.

In the drawings Figure 1 is a section throu h a refrigerator accordingto this invention, s owing the various elements in place, anddiagrammatically representing the several connections ci the variousparts.

Fig. 1a is a detail view showing the damper operating lever forcontrolling the flow of air.

Fig. 2 is a horizontal section substantially 60 on the line 2-2 of Fi 1.

Fig. 3 is a diagram 0% the electrical connections in Figs. 1 and 2.

Fig. 4 is a section substantially on line 4-4 of Fig. 5 showing the aircooled refrigerating 65 unit according to this invention.

Fig. 5 is a section of the same substantially on line 5 5 of Fig. 4.

Fig. 6 is an enlarged detail section on line 6-6 of Fig. 5. 70

Fig. 7 is a cross-section through the expansion tank of this invention.

Fig. 8 is a section substantially on line 8-8 of Fig. 7.

. Fig. 9 is a horizontal section substantially 75 on the line 9-9 ofFig. 7.

Fig. 10 is a diagrammatic view in section through'a room, showing theapparatus connected to the inlet and outlet pipes for the cooling air.

Fig. 11 is a detail view on much larger scale showing one of the damperdevices for controlling the flow of cooling air through the variouspipes.

Fig. 12 is a detail of a damper handle and 85 its sector plate.

The refrigerator as shown in Fig. 1 comprises the outer heat-insulatingcasing having therein the horizontal bottom heatinsulating partition 101and an intermediate 90 vertical partition 102 having the apertures 102aand 1021. The base of the refrigerator is closed on all sides by thecasing 100a and has a bottom 103 spaced from the floor upon n whichr therefrigerator is placed. An inter- 9 mediate partition 104 separates thebottom compartment into two separa-te chambers 105 and 106, which may beclosed substantially air-tight by a front door. On the rear of therefrigerator is mounted a vertical stack 107 100 which extends from thetop ofthe refrigerator downward to a point opposite the bottomcompartments 105 and 106. Branching from this vertical pipe 107 are thehorizontal branch pipes 108 and 109 which have their respective orifices110 and 111 opening into the respective bot-tom chambers 105 and 106. Inalinement with the vertical pipe 107 is a vertically disposed pipe 112which leads downward to the base of the refrigerator. The pipes 107 and112 are open to the apartment respectively at the top and the bottomend. A damper 113 is pivotally mounted on a shaft 114, and may occupyeither of the two end positions designated bythe letters S and W inFig. 1. The shaft 114 carries 011 the outside of t-he pipe system thecrank arm 115 with the crank pin 116. An operating shaft 117 projectsthrough the structure of the refrigerator box from the front facethereof and carries a't its rear end a crank arm 118 having a slot 119therein to engagewith the crank pin 116 (Fig. la). On the front end ofthe shaft 117 may be disposed a suitable handle and indicator foroperation by the attendant. Accordingly as the shaft 117 is rotatedclockwise, or counterclockwise as in Fig. 1, the damper 113 will berocked respectively into the W or the S positions,

and thus place the pipes 107 and 112 in alternate communication with thepipesi'109 and 108.

frigerating unit of the type to be more fully described hereinafter,which as its base 10 mounted upon the bottom 103 of thelrefrigerator,and has an electric motor 11 to drive the Ventilating fan 12, which isdisposed opposite an opening 120 in the partition 104,

so that during the operation of the motor 11," air is drawn by the fanfrom the chamber 105 and forced downward through the pipe 19 and thebase 10 of the unit and delivered through the aperture 21 into thecompartment 106.

It will bc understood than when the damper 113 is in the position S, theair from the upper portion ofthe room will be withdrawn through thepipes 107 and 108 and through b the aperture 110 into the chamber 105,thence passing through the fan 12 and conduit 19, the base 10 and thenthrough the aperture 21 into the chamber 106, from which it furtherpasses through the aperture 111 by pipes 109 and 112 to be dischargedfrom the bottom end of the latter. It will be understood that exhtensionpipes such as those shown in dotted lines at 121 and 122 may be attachedrespectively to the pipes 107 and 112 so that air from near the ceilingof the room may be drawn into the pipe 107 and the air from pipe 112 maybe discharged through the conduit 122 to the exterior of the building.

On the contrary, when the damper 113 is in the position W, air is drawn,for example,

bly,

from the exterior of the building through the pipe 122, into the pipe112 and thence passes y pipe 108 and aperture 110 into the chamber 105from which, in the same manner as before, it is drawn by fan 12 anddischarged intermediately into the chamber 106, from which it flowsthrough the aperture 111 and pipes 109 and 107 and is Yfinallydischarged near the ceiling of the room.

By means of this regulatable Ventilating system, it is possible towithdraw the warm air from the room as desired and discharge it to theexterior or to supply fresh air from the exterior at a relatively lowtemperature and warm it by passage over the refrigerating unit anddischar e it into the room. A further advantage to e obtained from thisarrangement is that the bottom compartment of the refrigerator isconstructed substantially airtight,'and in the event of a break orleakage of any.r part of the refrigeratin unit and pipes associatedtherewith, any fou or offensive gases escaping are passed into thechamber 106: the attendant then can easily move the damper 113 intoposition S and thereafter all such gases are discharged through the pipe112 to the exterior, and hence are prevented from injurious effects uponthe health of persons within the apartment.

It` is preferred to construct the base 10 l and the motor 11 andcompressor 13, 66, as Mounted in the compartment 106 is a refan 12 andthe partition 104 asa rigid assemso that it may be easily and quicklywithdrawn from the lower compartment after the door to the same has beenremoved and the connections to the several pipes 60 and 64 have beensevered at appro riate unions provided for that purpose. o facilitatethe separation of the unit, the electric motor is provided with the leador power wires 125 which are connected to a detachable plug 126 mountedin the wall of the connecting box 127. This box in turn is connected bya duplex cord 128 with a current tap 129. It will be understood thatproper fuses may be mounted within this ox as shown at 130 in Fig. 3.For the control of the electric motor, it is preferred to provide athermostatic element 131 located within the food compartment of therefrigerator and connected by the conductors 132 passed through suitableconduits to the box 127, as shown in Fig. 3. In order to obtain a manualcontrol of the motor independent of the thermostat arrangement, a manualswitch 133 is mounted upon the face of the refrigerator and adapted toshort-circuit the thermostat 131 when desired.

. The refrigerating unit consists of a base 10 having mounted thereonthe electric driving motor 11, a Ventilating fan with the casing 12, anda crank case casting 13 of a compressor pump. Within the base 10 is aliquid refri erant tank 14 and a cooling coil 15. The base is closedsubstantially air-tight at its bottom b the plate 16 which is held` inlace by t e screws 17. The fan casing 12 i'ias the impeller element 18driven from the electric motor 11, for delivering air under pressurethrough the conduit 19 and an aperture in the top of the base 10. Theair flows through the base, over and aroundthe coiled pipe and over andunder the baffle lates 20 arrano'ed in the base, until it makes lts exitthrough an aperture 21 on the far side of the base. It will beunderstood that the cold air passes over these pi es and `cools theircontents gradually and nall makes its escape at a distance from, an isdischarged in a direction opposite to, the inlet to the Ventilating fan12.

It will be understood that air may be passed in either directionthroughl the condenser in accordance with its construction andoperation, so that the air is caused to travel through the base and thuscool the tubing. In this way fresh and cold air is being constantlypassed through the base. It is preferred normally to pass the air fromthe fan to the coils.

The electric motor 11 is mounted on the offset integral portion 22 ofthe base 10, and has the coupling 23 upon its shaft,-and thereby drivesthe shaft 24 and worm 25 of a transmission having the wor-m wheel 26.The worm wheel 26 is mounted within the casting 27 which is secured uponthe crank case 13 of the compressor, and carries at its top a` furthercasting 28 for the reception of the worm. At the compressor end of theworm shaft 24 is indicated a self-alining thrust ball bearing 29, whichmay be adjusted by the threaded bushing 30. It will be noted that themotor end of the worm shaft 24 is supported directly upon the motorshaft by a `flexible coupling, so that a free movement is afforded tothe worm shaft and the motor and shaft may operate together at a highrate of speed without danger of bending the shafting.

Near the motor end of the worm shaft 24 is mounted a collar 24a, whichprojects laterally of the shaft and into an annular groove 28 providedin the bore of the casting 28 which accommodates the shaft; this groovein turn communicates by a pipe 28" with the interior of the casting 27.It Will be understood that as the motor drives the worm and thereby theworm wheel 26, oil contained in the casing 27 will be carried around andonto the worin 28 and will flow along the shaft 28 thereof to lubricatethe several parts. ln order to prevent a throwing 'of oil to theexterior, or a wastage at the motor end 'of be flung into the grofve 28,which collects and delivers it through the passage 2,8b back into theinterior of the castinv 27.

The worm wheel 26 is keyed upon the driving shaft 31g which is journaledat one end in the bearin bushing 32 in the end of the casting 27. T isshaft 31 is carried in a bored hole in the casting boss 67 andsuccessively passes through a acking 33, through an oil chamber.v 34,anot er packing 35, a bearing bushing 36, and into the crank case 13 ofthe compressor, in which it is provided with offset cranks or eccentricsfor the connecting rods 37, 37 which actuate the pistons 38, 38. Thisshaft is also provided with the ball thrust bearings 39 to preventendwise movement of the shaft, and with al bearing bushing 40 mounted inthe wall of the crank case 13.

The lubrication of the two bearings of this shaft adjacent the crankcase is assured by wise dipping into the oil during operation..

A tightening bushing 43 having the tightening screws 44a is provided tocompress the packings 33 and 34. In order to hold these packings spacedapart and under -a consta-nt pressure during operation of the device, aspring 44 is mounted Within the oil bore 34 and pressing at each endagainst the plates or washers 46, which in turn press against thepackings 33 and 35.

As shown in Fig. 6, the oil bore 34 is in communication by the coredpassages 47 with an annular cored passage 48 which surrounds the entireshaft and constitutes an oil reservoir for maintaining an ample supplyof oil above-the level of the packings and spring. All these chambersare formed integrally in the casting boss 67. By the use of this doublepacking, gases are prevented frompassing from the interior of thecrankcase 13 through the packing 35 into the oil bore 34 and the oilreservoir 48 connected therewith. If, after wear on the shaft andbearings, such passage does occur, the further packing 33 prevents thegases from having access to the interior of the casting 27 in which theworm wheel 26 is located.

In order to supply oil to the'oil reservoir 48, the oil cup 50 isprovided with a hermetically closable screw top 51 and a valved outlet52, and may be threaded into the connection 53 in the top of the oilreservoir 48. If it be desired to replenish oil or to deliver a furthersupply into the oil reservoir 48, the cover 51 may be removed, the oilcup 50 filled and the cover replaced. When the valve 52 is opened theoil will How into the oil reservoir 48 irrespective of any pressuredifferences or the presence of any gases in the oil reservoir 48. Itwill be noted that no offensive gases escape from the reservoir 48during the fillin operation.

t will be understood that the compressor is provided with the usualinlet valves 55 in the heads of the pistons, and the outlet valves 56 in.the compressor head block 57. The gases returning from the refrigeratigsystem are delivered through the pipe 60 into the crank case 13 ofthecompressor, and are sucked therefrom and compressed within thecylinders of the compressor and delivered through the compressor headblock 57 to the discharge pipe 61, which has a closing valve 62. Thedischarge from the pipe 61 is into the cooling coil 15 in the base ofthe unit. The hot compressed gases from the compressor are cooled inthis coil 15 until they condense, and are delivered through the terminalpipe 63 into the liquid refrigerant tank v 14. The liquefied refrigerantmay be drawn off through the discharge pipe 64 and the controlling valve65 therefor to the usual eX- pansion valve, after which they areemployed for cooling. and then return again in the eX- panded and warmedcondition through the pipe 60 to renew the cycle.

The structure is assembled by bolting the crank case 13 onto theassembled base 10 by the bolts 65, and then bolting the compressorcylinder casting 66 which has the offset boss 67 containing the packings33, 35 formed integrally therewith upon this crank case casting 13. Theshafts and pistons may then be mounted, and the packings tightened.

down by the bushing 43. The worm wheel 26 is then placed in position.and the end casting 27 therefor is bolted to the boss 67 by the bolts70. The electric motor 11 may now be secured to the offset 22 of thebase casting 10, and the worm shaft 24 and worm 25 connected to themotor shaft and placed in mesh with the worm wheel 26, and the casting28 bolted down by the bolts 29 upon the casting 27. It will beunderstood that the base casting 10 has been assembled with the tubing15 and reservoir 14 therein. and as soon as the compressor head block 57has been bolted down by screws 71, the pipes may be connected betweenthe head block 57 and the coil 15, and between the tank 14 and theexternal system, as well as the return pipe 60 therefrom. Lastly, thefan 12 may be set up.

It will be noted that the unit is very compact and yet accessible. Thevalves permit the shutting off of the liquid refrigerant delivery andthe withdrawal of substantially all gas from the external piping system,so that upon the dismounting of the apparatus, the inlet valve in pipe66 may be closed and thereafter the piping removed without substantialloss of obnoxious gases. Likewise,

taken apart without appreciable escape of gases.

The liquefied refrigerant is delivered through a pipe 64 from thereservoir 14 to an expanslon Valve represented diagrammatically at 150in Fig. 1. Thence the liquid refrigerant flows through a. pipe 151 to anexpansion tank 152, and makes its return through the pipe 60 to thecompressor.

The construction of the expansion tank 152 is set forth in Fig. 7 ashaving a casin with the end walls 153 and 154, and a num er of flues 155therein, which are headed into the end walls to form gas-tight joints160. A spiral baffle 156 causes the expanded gas to travel in acircuitous path over and around the several flues 155 until it arrivesat the bottom of the expansion tank. The bottom of the expansion tank isshaped to drain toward a depression 157 which has communication with thereturn pipe 60 for the gaseous refrigerant. It will be observed that anoil carried along into the pipe 64 and 151 will flow down the walls ofthe lues and the baffle plates and is collected in the depression 157and thence drained back to the compressor through pipe 60.

It is preferred to form the baffle plates of a series of distorted disksas represented at 156il and 156b in Fig. 7, which are joined at theirabutting radial edges by the seams 156C. It will be understood that thefit of the baffle plates around the respective liues need not be exact,since their purpose is merely to cause the expanded as to move in acircuitous path instead of passing directly from inlet to outlet. Theliquid entering through the pipe 151 is diverted into the discharge pipe158 and permitted to discharge through apertures 159 thereof.

The bottom of the expansion tank receives and supports a sleeve 161which is formed at its bottom edge with the projecting lugs 162 whichare welded to the catch basin 163. This catch basin is formed asa funneland at its downward apex terminates in a conduit 164 which supports areceiving cup 165.

Within the sleeve 161 are arranged the pent-roof plates 166 with theinwardly turned edges 167, and the downwardly extending brackets 168,which act as guides for the drawers, and prevent deposited moisture fromdripping into them. In the front face of the sleeve 161 are providedapertures for the trays 169 with face plates 1693*. These are intendedas customary for receiving water which is to be frozen into ice by therefrigerant, and which are supported in position by the screen 170 whichin turn is supported at its periphery upon the sleeve 161.

Air cooled by the flues 155 flows downwardly and through the holes 171in the' lll lll

ing in its coolest condition to chill the water in the trays 169.

The method of operation of this expansion tank in the system is asfollows: The tank for an ordinary ice box is about 12 inches in diameterand 18 inches long for the expansion chamber proper. The diameter of theflues 155 is represented as being around 2` inches. It is obvious thatit is a very large area for this tank as comparedwith the presentlyemployed tanks, so that there is a very large radiating surface for thetreatment of the air confined in the refrigerator. Thethermo-circulation of the air downwardly in the expansion tankcompartment and upwardly in the food compartment of the refrigeratorcauses a rapid exchange of heat to occur. It will be noted that thethermostat which controls the operation of the electric motor is locatedat the upper part of the food compartment and therefore is exposed tothe maximum temperature prevailing in the refrigerator.

The current of air flowing downwardly in the expansion tank compartmentflows over and through the tank and is chilled thereby. The air flowingthrough the flues is diverted at the bottom by the baille plates 166,and passes downwardly through the apertures and through the spacebetween the two plates 166. rlfhis air then flows over and around thedrawers 169 containing water, and through the screen upon which thedrawers rest, and finally makes an exit from the casing 161 through theseveral apertures provided. It is therefore to be seen that thetemperature of the air is reduced by the expansion tank and that thecold air is caused to act upon the trays and thus to freeze the waterwithin them.

During this movement downward of the air over and through the expansiontank, 1t separates aL portion of its moisture onto the surface of thetank, and during the operating period of the refrigerating systemproper, the cold expanded gas maintains the surface of the expansiontank slightly below freezing, to obtain an increased radiation thereforor absorption therefrom of heat by thls gas. During this part of theoperation the separated moisture tends to freeze and accumulate on thewalls of the tank. Since the area of the tank is large, only a smallquantit-y of water will be separated out on any particular portionthereof. When the refrigerating plant has reduced the internaltemperature of the ice box to the required degree and has been shut downby the action of the thermostat, and the liquid refrigerant has beentotally discharged by the balancing of the respective pressures, thewalls of the tank are slightly warmed by the current of air, since theyare no longer maintained cold by the internal gas. The walls remainsubstantially at the freezing point for a considerable time owinr to thelatent heat required kupper surface of this drip pan between the lugs162. This water collects in the detachable cup 165, and since it issubstantially at the freezing point, it serves as a heat Stora e unitfor maintaining the temperature wit in the ice box, and by reason of thesmall surface of the cup, does not readily give olf its moisture to theair.

Since the usual temperatures to be maintained within an ice box arebetween freezing and 40", and a preferable temperature is 33 or 34, itis obvious that by the use of the large surface of the present expansiontank, and by working the tank at the relatively high temperature rangeof 32 to 33, that it is possible to maintain the surface of the tanksubstantially free from congealed moisthawing of depositedrnoisture,that a tankA having very slightly greater cooling surface than a usualsuper-cooled coil system is suflicient for an ordinary ice box.

The peculiar construction of the assembly renders the device suitablealso for ventilating the room in which it is placed, or with which itmay be connected by air conduits in other ways than that shown inFig. 1. In Fig. 10, the apparatus is shown as dlsposed in a room havingthe side walls 101', 102 and the ceiling 103, with a shelf or floor 100'therein. It will be understood that the room may be of any sizedetermined by architectural considerations, but that parts have beenbroken away for greater clearness in the drawings. The apparatus ismounted upon the door or shelf 100 in this room, and is connected at oneend by a conduit 104 with the air outside the room, and by a conduit 105with the air adjacent the ceiling of the room, as well as by an openingat 106 with the air adjacent the machine itself. At the other end of theapparatus, it is connected by a pipe 107 with the `air outside the room,and by a pipe 108 with the room adjacent the floor, or with a lowerapartment: a pipe 109 likewise leads to a point near the ceiling of theroom itself.

Each of the three communications is controlled by a double damper valveas shown in Fig. 11. W'hile this valve has been illustrated for theconnection of the pipes 107', 108', 109', it will be understood that asimilar structure is used at the other end. Each of these damper devicescomprises a casing with a pair of pivots 110', 111', having at the endoutside of the casing a rigidly connected operating handle 112', 113',respectively. Each of these handles has an oli'set lug 114 which isadapted to be snapped bythe resiliency of-the handle into one oftheapertures 115 of the respective segment plate 116', so

that the damper is held in a. predetermined position. Rigidly connectedto each of the respective shafts 111 and within the casing is a damper117, 118', which may be moved into and held by the means described abovein any of three positions (horizontal, inclined, and vertical),corresponding to the three notches on each of the sector plates. If thedamper 117 is in the horizontal position shown in Fig. 11, all movementsof air through conduit 109 is substantially shut off. If the damper 118is then in the horizontal position, the sole movement of air through thecasing occurs through pipe 107. If the damper 118 be swung tothe-vertical position, all movement of-air occurs through conduit 108.If the damper 118 be in the horizontal position and damper 117', inthevertical position, all movement of air occurs through conduit 109.

The inclined positions of the dampers are employed to give proportionatemovements of air through two or more of the pipes. For example, when thedamper 118 is m the inclined position shown in dotted lines in Fig. 11,and the damper 117 is closed. the movement of air occurs through bothconduits 107 and 108.

It is apparent that a similar construction as used at the other end ofthe apparatus will permit a similar regulation of the direction andmovement of the air.

By such means, it is possible to move the air within the room, or toexchange the air either inwardly or outwardly through the Ventilatingsystem of the apparatus. Since an apparatus of this type may move, forexample. 200 to .225 cubic feet of air per minute during its normaloperation, it is apparent that the air in a kitchen of say 10 feet cubewould be exchanged every live minutes. For example, in summer, thedampers may be set so that the hot air near the ceiling of the room issucked through conduit 105 into and through the machine and delivered tothe eX- terior of the building through conduit 107` In winter. the coldair near the floor of the room may be drawn in through the opening 106.passed through the machine .for cooling the coils and thereby itself beheated. and again delivered to the room near the ceiling through thepipe 109', or near the` floor through the pipe 108.

If the passage of fresh air through the room is desired or the removalof foul air required. the fresh air may be drawn in through pipe 104,and discharged into the room near the ceiling or floor. or the foul airfrom near the ceiling or floor may be discharged through the pipe 107.

The base is a rigidfstructure containing the cooling coil for the hotrefrigerant gases, over which a current of cooling iluid is caused topass, and upon which are mounted the compressor and its drivingmechanism.

It is obvious that changes may be made in the sizes andarrangcments'o't' the various parts without departing from the inventionas set forth in the appended claims.

IV hat I claim is:

1. In a mechanical .refrigerating plant, a, hollowfbase, a condensingcoil in said base, a source of power rigidly mounted on said base, acompressor mounted rigidly on said base, power transmission means forconnecting said source and said compressor, a Ventilating fan andconduit rigidly mounted on and communicating with said base to force acurrent of fresh cool air over said condensing coil without passingoversaid compressor, and a pipeuconnecting the compressor discharge withsaid condensing coil.

2. In a mechanical refrigerating plant, a` hollow base forming an airconduit, a condensing coil and a tank for condensed refrigerant locatedin said base, an electric motor mounted rigidly on said base, aventilating fan mounted on said base and driven by said motor to forcean air current through said base, a compressor mounted on said base andconnected to said motor, and balile plates in said base to cause suchair current to move in a circuitous path over and around said coil andsaid tank, the intake end of said fan be ing removed in position andoppositely directed from the discharge end of said conduit in said basewhereby fresh cool air is delivered by said fan to said conduit withoutpass,- ing over said compressor, and is discharged therefrom in adirection away from said intake end.

3. In a mechanical refrigerating plant, a chambered base, a compressorrigidly mounted on the outside of said base, a source of power rigidlymounted on the outside of said base, driving connection between saidsource of power and said compressor, a condensing coil for refrigerantgas connected to the discharge from said compressor and located in saidchambered base, means operated by said source of power to delivercooling Huid to said base at one point thereof and to withdraw ittherefrom at a distant point without having passed over said compressor,and baffles in said base to cause the fluid to pass over and around saidcondensing coil.

4. In a refrigerating plant, a compressor for the expanded refrigerantgas, a source of power operatively connected to said compressor to drivethe same, an air cooled condenser for the refrigerant gas to receive thesame from said compressor, and means including a fan and conduitswhereby fresh cool air may be drawn from the surrounding atmosphere' ata point .remote from said compressor and source and delivered over saidcondenser without passing said compressor and source, said meansincluding a conduit surrounding said condenser whereby to prevent.contact of said air with said compressor and to discharge the air afterbeing heated by contact with said condenser at a point adjacent saidcompressor.

5. In a refrigerating plant for employment in an apartment, acompressor, an air conduit, a refrigerant condenser in said conduit,means to drive said compressor, means to cause air to move through saidconduit, pi es leading from near the ceiling of said cham r respectivelyto the inlet and outlet ends of said conduit, pipes leading from theexterior of said apart-ment respectively to the inlet and outlet ends ofsaid conduit, pipes leading from the lower part of said apartmentrespectively to the inlet and outletends of said conduit, and dampers toselectively regulate the flow from and into said pipes into and fromsaid conduit.

6. In a refrigerating plant for employment in an apartment, acompressor, an air conduit, a refrigerant condenser in said conduit,means to drive said compressor, means to cause air to move throughsaidconduit, and means including pipes communicating with the inlet andoutlet ends of said conduit for selectively moving air to and from theeXterior and predetermined interior points of said apartment, anddampers to selectively regulate the How from vandinto said pipes intoand from said conduit.

7. In a refrigerating apparatus, walls for providing a heat-insulatedstorage chamber,` means to cool said storage chamber including amechanical refrigerating plant having a motor, ay compressor and an aircooled condenser, a casing connected to said storage chamber Walls, anda partition dividing the interior of the casing into compartments, saidmotor, compressor and condenser being disposed in one of saidcompartments, a thermostat in said storage chamber, air conduits to saidcompartments, a fan to move air through said conduits and compartmentsand over said condenser, an electrical connection box and conductorstherefrom to said thermostat and a source of power, and a separableconnection between said box and said motor, whereby said motor,compressor and condenser may be removed from said casing as an assembly.

8. In a refrigerating apparatus, Walls for providing a heat-insulatedstorage chamber, means to cool said storage chamber including amechanical refrigerating plant having a motor, a compressor and an aircooled condenser, a closed casing connected to said storage chamberwalls, said motor, compressor and condenser being mounted as a unit, anapertured partition mounted on said unit and dividing saidv casing intotwo compartments when positionedy therein, said unit being positioned inone compartment, a fan to move air through said aperture and directedover said condenser, air conduits to convey air to and from saidcompartments, and means whereb said unit, partition and fan c may bewith rawn as a whole from said casing.

9. In a portable refrigerating apparatus for use in an apartment, andincluding Walls for providing a heat-insulated storage chamber connectedwith a, closed casing, means to cool the said storage chamber includinga mechanical refrigerating plant having an air cooled condenser, saidplant and condenser being mounted in said casing, air conduits lcarriedby said storage chamber walls and casing to take air from and deliver itto different points in said apartment, and a. fan to move air throughsaid conduits and over said condenserand thence over said motor andcompressor.

l0; In a gas expansion tank for refrigerating systems, a. closed casinghaving side, top and bottom walls, open-end flues sealed at their endsinto said top and bottom Walls, a spiral baille plate in said casing andaround said flues, a conduit to deliver liquid refrigerant to saidcasing, a conduit to remove gaseous refrigerant therefrom, and means tocollect liquid condensed on the Walls of said casing' and flues.

1l. In a gas expansion tank for refrigerating systems, a closed casinghaving side, top and bottom Walls, open-end fines sealed at their endsinto said top and bottom walls, a spiral baille plate in said casing andaround said flues, a conduit to deliver liquid refrigerant into saidcasing, a perforated release pipe in communication with said deliveryconduit to discharge the liquid into the passage formedby said baiileplate, and a conduit to remove gaseous refrigerant from said casing.

12. In a gas expansion tank Jfor refrigerating systems, a closed casing,a spiral baille plate in said casing composed of a plurality of radiallyplit disks distorted out of plane, interlocking seams formed on theradial edges of said disks, and means to bring liquid refrigerant to andremove gaseous refrigerant from said casing.

13. In a gas expansion tank for refrigerating systems, a closed casinghaving side, top and bottom walls, a spiral baffle plate presenting acontinuous gravitative surface, a sump formed in said bottom wall, a.conduit to deliver liquid refrigerant to said casing adjacent said topwall whereby the same may expand and gasify during its downward movementalong said baille plate and admiXed oil may trickle by gravity into saidsump, and a conduit to remove the gaseous refrigerant from said casing.

14. In a gas expansion tank for refriger-i atingsystems, a closed casinghaving side, top and bottom walls, a spiral baille plate presenting acontinuous gravitative surface, a sump formed in said bottom wall, aconduit to deliver liquid refrigerant to said casing adjacent said topwall whereby the same may expand and gasify during its downward movementalong said baie plate and admixed oil may trickle by gravity into saidsump, a conduit to remove the gaseous refrigerant from said casing, anda gravity conduit in communication with said sump to remove the gaseousrefrigerant and oil therefrom. Y

15. In a gas expansion tank for refrigerating systems, a closed casinghaving air tlues therein opening through the bottom wall of said casing,means to admit refrigerant medium to and withdraw it from said casing,jacket walls for providing a chamber mounted at the bottom of saidcasing having perforations therein, water trays supported in saidchamber, and deflectiug` plates to cause the cold air from said fillesto traverse a circuitous path around said trays and through saidperforations.

1G. In a gas expansion tank for refrigerating systems, a closed easingand means to cool the same by expanding refrigerant medium, a sleeve atthe bottom of said casing having downwardly projecting lugs to defineair passages for the movement of air past the cool surfaces of saidcasing, and a drip pan securedto said lugs and extending beyond saidcasing to receive the drip therefrom.

17. In a gas expansion tank for refrigerating systems, a closed casinghaving side, top and bottom walls, fines having open ends and sealedinto vsaid top and bottom walls, a sleeve secured at the bottom of saidcasing, a drip pan secured to the bottom of said sleeve with drainageapertures therebetween, and a receiving cup on said pan, wherebydeposited moisture on said casing and flues may drain by gravity intoand be collected by said cup.

18. In a gas expansion tank for refrigerating system, a closed casinghaving side, top and bott-em walls, flues having open ends and sealedinto said top and bottom walls, a sleeve secured at the bottom of saidcasing, a drip pan secured to the bottom of said sleeve with drainageapertures therebetween, water trays supported in said sleeve, angularlydisposed roof plates over said trays to deflect dripping moisturetherefrom, and a receiving cup on the said pan, whereby depositedmoisture on said casing and lues may drain by gravity into and becollected by said cup.

19. In a gas expansion tank for refrigerating systems, a closed casinghaving side, top and bottom walls, flues having open ends and sealedinto said top and bottom walls, a sleeve secured at the bottom of saidcasing, and having apertures therein, a drip pan secured to the bottomof said sleeve W'ith drainage apertures therebetween, a horizontalperforated screen secured in said sleeve, water trays on said screen,baile plates to deflect moisture from said trays and cause the cold airfrom said lues to traverse a circuitous path around said trays to thesaid apertures, and a receiving cup on the said pan, whereby depositedmoisture on said casing and flues may drain by gravity into and becollected by said cup.

20. In a gas expansion tank for refrigerating systems, a closed casinghaving slde, top and bottom walls, flues having open ends yand sealedinto said top and bottom walls, a

sleeve secured at the bottom of said casing, and having aperturestherein, a drip pan secured to the bottom of said sleeve with drainageapertures therebetween, a horizontal perforated screen secured in saidsleeve, water trays on said screen, baffle plates to `deflect moisturefrom said trays and cause the cold air from said flues to traverse acircuitous path around said trays to the said apertures, downwardlyprojecting members on said baiile plates to guide said trays and preventpassage of moisture from said plates into said trays, and a receivingcup on the said pan whereby deposited moisture on said casing and luesmay drain by gravity into and be collected by said cup.

21. In a refrigerating plant, a compressor for the expanded refrigerantgas, a source of power to drive said compressor, a hollow basemember,`said compressor and source of power being rigidly mounted onsaid base, an air cooled condenser located in said base andcommunicating with said compressor to receive the compressed refrigerantgas therefrom, and a fan operated by said source of power and rigidlyfastened on said base to force fresh, cool air through said base oversaid condenser and to discharge the air after being heated by Contactwith said condenser at a point remote from the intake, whereby said airis brought directly to said condenser without having passed over saidcompressor.

22. In a refrigerating apparatus, walls for providing a heat-insulatedstorage chamber, means to cool said storage chamber including amechanical refrigerating plant having a motor, a compressor and an aircooled condenser, means providing a compartment in which said motor,compressor and condenser are located, a wall surrounding said lcondenserand providing an air conduit, a fan to move air from the exterior ofsaid compartment through said conduit and over said condenser and thenceinto the part of said compartment external to said conduit, and adriving connection between said motor and said fan, whereby said fan isoperated to draw fresh cool air from the exterior of the compartment andpass it firstly over said condenser and thereafter over said compressor,said means being provided with an air outlet.

23. In a refrigerating apparatus, walls for providing a heat-insulatedchamber, a compressor Ior the expanded refrigerant gas, means to drivesaid compressor, a casing disposed below and in alignment with saidchamber, said compressor and driving means being located in said casing,a first vertical air conduit having an open top end, branch air conduitsand a second vertical air con duit having an open bottom end, valvemeans to connect said first vertical air conduit to either of saidbranch conduits and the second air conduit to the otherbranch conduit, adevice to actuate said valve means for reversing the connection, anapertured partition in said casing, said branch conduits communicatinwith the chambers at respective sides of sald partition, an air-cooledcondenser in said casing in communication with said compressor, and afan mounted in the aperture of said casing.

24. In a refrigerator apparatus for use in an apartment, walls forproviding a heatinsulated storage chamber, means to cool said storagechamber including a mechanical refrigerating plant having a motor, acompressor and an air-cooled condenser, a casing connected to saidstorage chamber walls, anl air inlet conduit from said apartment openinginto said casing, an air discharge conduit from said casing to a pointoutside the apartment in which said casing is located, said motor,compressor and condenser being located in said casing, and a fan formoving air through said inlet conduits and over said condenser to coolthe same and thereafter through the discharge conduit to discharge theair outside the apartment, whereby leaking gases are discharged outsidethe apartment.

25. In a refrigerating apparatus, walls for providing a heat-insulatedstorage chamber, means to cool said storage chamber including amechanical refrigerating plant having a motor, a compressor and anair-cooled condenser, a closed casing connected to said storage chamberwalls, said motor, compressor and condenser being mounted as a unit, anapertured partition dividing said casing into two compartments, saidunit being positioned in one compartment, a fan to move air through saidaperture and direct it over said condenser, air conduits to convey airto and from said compartments, and means whereby said unit and fan maybe withdrawn as a whole from said casing.

26. In a refrigerating apparatus, walls for providing a heat-insulatedstorage chamber, a casing connected to said storage chamber walls, amotor, a compressor and an aircooled condenser located in said casing, aconduit to admit air into said casing adjacent said condenser, a fan formovmg air through said casin whereby the freshy air first encounters saicondenser without passing over said motor and compressor, a conduit fordischarging air from said casing, and means in said casing to preventthe flow of air from said motor and compressor over said condenser.

In testimony whereof, I aix my si nature.

LUCIEN L. TOR EY.

